Flowback Fluid Manifold Skid with Hydrocyclone Separation
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Solution Overview
Problem
Conventional horizontal separators for processing flowback fluid from hydraulic fracturing are inefficient due to sand accumulation, which increases retention time and decreases efficiency, and lack individual metering capabilities for multiple wellheads.
Innovation Solution
A system with multiple first and second stage separators, each with independent temperature, pressure, and retention time control, and a manifold skid for distributing flowback fluids to separate gas, liquids, and solids efficiently, allowing for individual wellhead metering and processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single large horizontal separator is used to process flowback fluid from multiple wellheads, then all phases (gas, oil, water, sand) can be separated in one vessel, but sand accumulates in the separator increasing retention time and decreasing processing efficiency
Solution Approach 1:
The patent divides the single horizontal separator into multiple separate processing stages: a solids separator (hydrocyclone) for sand removal, followed by a liquid-gas separator for phase separation. This segmentation allows each component to be optimized for its specific function, preventing sand accumulation in the liquid-gas separator and reducing retention time while maintaining effective separation of all phases.
2Measurement precision
If a single horizontal separator processes flowback fluid from multiple wellheads, then equipment complexity is reduced, but individual wellhead metering and evaluation become impossible
Solution Approach 1:
The patent assigns a dedicated metering device to each wellhead, enabling individual flow measurement and evaluation. The system is segmented into wellhead-specific processing paths that converge at the solids separator, allowing precise measurement of each wellhead's contribution while maintaining an organized multi-component system configuration.
Solution Approach 2:
The solids separator (hydrocyclone) serves as a universal processing component that receives flowback fluid from multiple wellheads after individual metering. This multi-functional component handles solids separation for all wellheads simultaneously, reducing overall system complexity while preserving individual wellhead measurement capabilities.
3Reliability
If solids separation is performed upstream before the horizontal separator, then sand accumulation in the separator is prevented, but the higher temperature and pressure conditions cause more damage to the solids separation equipment
Solution Approach 1:
The patent replaces the conventional mechanical solids separator (subject to wear from abrasive sand at high temperature and pressure) with a hydrocyclone separator that uses centrifugal force generated by fluid dynamics. This non-mechanical separation method eliminates moving parts that would wear from sand abrasion, significantly extending equipment working life while maintaining reliable solids removal and protecting downstream separator performance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces retention time, increases efficiency, and enables safe, controlled processing of flowback fluids by actively separating solids and optimizing gas and liquid phases, overcoming the limitations of conventional systems.
Implementation Method 1
a hydrocyclone separator that receives the flowback fluid and separates sand and other solids from the flowback fluid
Implementation Method 2
gases release to the top, oil rises above water, and denser sand falls to the bottom
Implementation Method 3
the sand settles on the bottom and can fill the vessel
Data Source
AI summary
The system and method for processing flowback fluid include a plurality of wellheads producing flowback fluid flows, a manifold skid, a plurality of first stage separators corresponding to at least one wellhead of an installation with multiple wellheads and multiple flowback fluid flows, a plurality of metering devices corresponding to each first stage separator, and a second stage separator in fluid connection with the metering devices and the first stage separators. Flowback fluid flows pass from the wellhead to the manifold skid so that the flowback fluid flows can be distributed under controlled conditions, such as temperature, pressure, and flow rate. The manifold skid improves safety, efficiency, and control of the later separation processes in the first stage separators and second stage separator.